Where can I find a blue windsor tux like the one worn by Carries date in the movie Carrie?

Question

Blue tux with velvet lapels and blue ruffled shirt.

Answer 1

The closest thing I could find to that tux, that is a costume, is the Dumb & Dumber costume. Links are below.

If you really want the exact tuxedo, I would try vintage shops or thrift stores. You may even be able to rent one from a tuxedo shop, probably not one of the main stream ones.